Copying a live system

[Timothy Murphy <gayleard@xxxxxxxxxx>]

I want to backup my current CentOS-7.2 system to another drive.
Is it safe to copy the system while it is running?
Eg by
mount /dev/sdb5 /mnt
rsync -HPaxvz /. /mnt/
I've found contradictory advice on the web.

-- 
Timothy Murphy  
gayleard /at/ eircom.net
School of Mathematics, Trinity College, Dublin


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